Qtxsound VH45B User Manual
Operation
With levels turned down, connect a 6.3mm jack lead from the receiver to the P.A.
system or mixer and extend the antenna vertical to the receiver unit.
On the handheld transmitter, with the POWER switch off, unscrew the battery cover
and connect a good 9V (PP3) battery to the contacts, taking note that the “+” and “-“
connections are correct
With the VOLUME control turned fully down (anticlockwise), connect the DC adapter
to the receiver unit and then into the mains outlet, making sure that the adapter and
lead are in good condition.
Switch on the POWER on the handheld transmitter and check that the RF LED is
illuminated on the receiver. Switch off the MUTE and speak loudly into the
microphone, checking that the AUDIO PEAK LED on the receiver flashes with the
loudest sounds
Turn up the level on the P.A. system or mixer and then turn up the VOLUME control
(clockwise) on the receiver. The microphone should now be heard through the P.A.
system or mixer
After use, turn down the level on the P.A. system or mixer and then turn down the
VOLUME on the receiver, MUTE the transmitter and switch off POWER
Disconnect the receiver from the P.A. system and then unplug from the mains
If not used for a long period of time, remove the battery from the transmitter
Specifications
Power supply - Receiver
9-15Vdc (adapter supplied) 200mA
Power supply - Transmitter
9Vdc batter (PP3 type, supplied)
Carrier frequency
174.5MHz
Max deviation
±25kHz
Dynamic range
>90dB
THD
<0.5%
Frequency response
40Hz-15kHz ±3dB
Audio output
400mV
Signal to noise ratio
>90dB
Channel rejection
>80dB
Receiver sensitivity
10dBuV
Max continuous battery life
10 hours
Dimensions - Receiver / Transmitter
150 x 110 x 35mm / 250 x 50mmØ
Weight - Receiver / Transmitter
190g / 280g
1622
© QTX Sound 2010
VH45B
Wireless Microphone System
171.801
USER MANUAL